Composition and method for improved aluminum hydroxide...

Details Composition and method for improved aluminum hydroxide... Composition and method for improved aluminum hydroxide...

C - Chemistry, Metallurgy

01

F

C01F 7/02 (2006.01)

Patent

CA 2613342

An improved method and composition for producing aluminum hydroxide crystals in a Bayer process pregnant liquor, involve the addition of a crystallization modifier comprising a C8-C10 fatty acid, precursors, salts or blends thereof. The alkyl chain of the fatty acid crystallization modifier is free of functional groups. The modifier yields a commercially in the presence and absence of an hydrocarbon oil which dissolves the fatty acid.

L'invention concerne un procédé et une composition améliorés destinés à produire des cristaux d'hydroxyde d'aluminium dans une liqueur Bayer sursaturée. Le procédé consiste à additionner un modificateur de cristallisation comprenant un acide gras C8-C10, des précurseurs, des sels ou des mélanges correspondants. La chaîne alkyle du modificateur de cristallisation à acide gras est exempte de groupes fonctionnels. Ledit modificateur permet d'obtenir un produit d'hydroxyde d'aluminium commercialement acceptable en présence et en l'absence d'une huile hydrocarbonée dissolvant l'acide gras.

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